<template>
    <el-card class="page-container">
        <template #header>
            <div class="header">
                <span>文章管理</span>
                <div class="extra">
                    <el-button type="primary"
                        @click="visibleDrawer = true; clearData(); title = '添加文章'">添加文章</el-button>
                </div>
            </div>
        </template>
        <!-- 搜索表单 -->
        <el-form inline>
            <el-form-item label="文章分类：">
                <el-select placeholder="请选择" v-model="categoryId">
                    <el-option v-for="c in categories" :key="c.id" :label="c.categoryName" :value="c.id">
                    </el-option>
                </el-select>
            </el-form-item>

            <el-form-item label="发布状态：">
                <el-select placeholder="请选择" v-model="state">
                    <el-option label="已发布" value="已发布"></el-option>
                    <el-option label="草稿" value="草稿"></el-option>
                </el-select>
            </el-form-item>
            <el-form-item>
                <el-button type="primary" @click="articleList">搜索</el-button>
                <el-button @click="reset">重置</el-button>
            </el-form-item>
        </el-form>
        <!-- 文章列表 -->
        <el-table :data="articles" style="width: 100%">
            <el-table-column label="文章标题" width="400" prop="title"></el-table-column>
            <el-table-column label="分类" prop="categoryName"></el-table-column>
            <el-table-column label="发表时间" prop="createTime"> </el-table-column>
            <el-table-column label="状态" prop="state"></el-table-column>
            <el-table-column label="操作" width="100">
                <template #default="{ row }">
                    <el-button :icon="Edit" circle plain type="primary" @click="showDrawer(row)"></el-button>
                    <el-button :icon="Delete" circle plain type="danger" @click="deleteArticle(row)"></el-button>
                </template>
            </el-table-column>
            <template #empty>
                <el-empty description="没有数据" />
            </template>
        </el-table>
        <!-- 分页条 -->
        <el-pagination v-model:current-page="pageNum" v-model:page-size="pageSize" :page-sizes="[3, 5, 10, 15]"
            layout="jumper, total, sizes, prev, pager, next" background :total="total" @size-change="onSizeChange"
            @current-change="onCurrentChange" style="margin-top: 20px; justify-content: flex-end" />
        <!-- 抽屉 -->
        <el-drawer v-model="visibleDrawer" :title=title direction="rtl" size="50%">
            <!-- 添加文章表单 -->
            <el-form :model="articleModel" label-width="100px">
                <el-form-item label="文章标题">
                    <el-input v-model="articleModel.title" placeholder="请输入标题"></el-input>
                </el-form-item>
                <el-form-item label="文章分类">
                    <el-select placeholder="请选择" v-model="articleModel.categoryId">
                        <el-option v-for="c in categories" :key="c.id" :label="c.categoryName" :value="c.id">
                        </el-option>
                    </el-select>
                </el-form-item>
                <el-form-item label="文章封面">
                    <!-- 
                        不需要手动完成axios请求,el-upload会自动完成请求
                        auto-upload 设置是否自动上传
                        action 设置服务器接口路径
                        name 设置上传的文件字段名
                        accept 设置上传文件类型
                        headers 设置请求头
                        on-success 设置上传成功的回调函数
                        show-file-list=false表示不显示文件列表,单个文件不需要

                    -->
                    <el-upload class="avatar-uploader" :auto-upload="true" :show-file-list="false" action="/api/upload"
                        name="file" :headers="{ 'Authorization': tokenStore.token }" :on-success="uploadSuccess">
                        <img v-if="articleModel.coverImg" :src="articleModel.coverImg" class="avatar" />
                        <el-icon v-else class="avatar-uploader-icon">
                            <Plus />
                        </el-icon>
                    </el-upload>
                </el-form-item>
                <!--富文本编辑器 -->
                <el-form-item label="文章内容">
                    <div class="editor">
                        <quill-editor theme="snow" v-model:content="articleModel.content" contentType="html">
                        </quill-editor>
                    </div>
                </el-form-item>
                <el-form-item>
                    <el-button type="primary"
                        @click=" title == '添加文章' ? addArticle('已发布') : updateArticle('已发布')">发布</el-button>
                    <el-button type="info" @click="title == '添加文章' ? addArticle('草稿') : updateArticle('草稿')">草稿</el-button>
                </el-form-item>
            </el-form>
        </el-drawer>
    </el-card>
</template>

<script setup>
    import {
        Edit,
        Delete
    } from '@element-plus/icons-vue'

    import { ref } from 'vue'
    import {
        articleCategoryListService,
        articleListService,
        articleListAddService,
        articleListUpdateService,
        articleListDeleteService
    } from '@/api/article.js'


    //文章分类数据模型,如果后台数据无分类，就展示默认数据
    const categories = ref([
    ])

    //用户搜索时选中的分类id
    const categoryId = ref('')

    //用户搜索时选中的发布状态
    const state = ref('')
    //添加文章抽屉标题
    const title = ref('')

    //文章列表数据模型
    const articles = ref([])

    //分页条数据模型
    const pageNum = ref(1)//当前页
    const total = ref(20)//总条数
    const pageSize = ref(3)//每页条数

    //当每页条数发生了变化，调用此函数
    const onSizeChange = (size) => {
        pageSize.value = size
        articleList()
    }
    //当前页码发生变化，调用此函数
    const onCurrentChange = (num) => {
        pageNum.value = num
        articleList()
    }

    //显示文章分类列表
    const articleCategoryList = async () => {
        const res = await articleCategoryListService()
        categories.value = res.data
    }
    //显示文章列表
    const articleList = async () => {
        const params = {
            pageNum: pageNum.value,
            pageSize: pageSize.value,
            categoryId: categoryId.value ? categoryId.value : null,
            state: state.value ? state.value : null
        }
        const res = await articleListService(params)
        //渲染视图
        total.value = res.data.total
        articles.value = res.data.items
        //处理数据，给数据模型articles扩展属性categoryName
        for (let i = 0; i < articles.value.length; i++) {
            for (let j = 0; j < categories.value.length; j++) {
                if (articles.value[i].categoryId === categories.value[j].id) {
                    articles.value[i].categoryName = categories.value[j].categoryName
                }
            }
        }

    }
    articleCategoryList()
    articleList()
    //重置搜索条件
    const reset = () => {
        categoryId.value = ''
        state.value = ''
        articleList()
    }
    import { QuillEditor } from '@vueup/vue-quill'
    import '@vueup/vue-quill/dist/vue-quill.snow.css'
    import { Plus } from '@element-plus/icons-vue'
    //控制抽屉是否显示
    const visibleDrawer = ref(false)
    //添加表单数据模型
    const articleModel = ref({
        title: '',
        categoryId: '',
        coverImg: '',
        content: '',
        state: ''
    })

    //导入token
    import { useTokenStore } from '@/stores/token.js'
    const tokenStore = useTokenStore()

    //上传图片成功的回调函数,res是上传成功的返回值
    const uploadSuccess = (res) => {
        console.log(res)
        //将图片的url赋值给articleModel.coverImg
        articleModel.value.coverImg = res.data
    }
    //清空数据模型
    const clearData = () => {
        articleModel.value.title = ''
        articleModel.value.categoryId = ''
        articleModel.value.coverImg = ''
        articleModel.value.content = '<span></span>'
        articleModel.value.state = ''

    }
    //新增文章
    import { ElMessage } from 'element-plus'
    const addArticle = async (clickStates) => {
        //将文章状态赋值给articleModel.state
        articleModel.value.state = clickStates
        //调用新增文章的接口
        const res = await articleListAddService(articleModel.value)
        ElMessage.success('添加成功')
        //抽屉消失
        visibleDrawer.value = false
        //调用列表接口
        articleList()
    }
    //更新文章
    const updateArticle = async (clickStates) => {
        //将文章状态赋值给articleModel
        articleModel.value.state = clickStates
        //调用更新文章的接口
        const res = await articleListUpdateService(articleModel.value)
        ElMessage.success('修改成功')
        clearData()
        //抽屉消失
        visibleDrawer.value = false
        //调用列表接口
        articleList()
    }
    //编辑文章
    const showDrawer = (row) => {
        visibleDrawer.value = true
        title.value = '编辑文章'
        articleModel.value.title = row.title
        articleModel.value.categoryId = row.categoryId
        articleModel.value.coverImg = row.coverImg
        articleModel.value.content = row.content
        articleModel.value.state = row.state
        //扩展属性
        articleModel.value.id = row.id
    }
    //删除文章
    import { ElMessageBox } from 'element-plus'
    const deleteArticle = async (row) => {
        ElMessageBox.confirm(
            '是否确认删除该文章',
            '温馨提示',
            {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }
        ).then(async () => {
            const res = await articleListDeleteService(row.id)
            ElMessage({
                type: 'success',
                message: '删除成功！'
            })
            //刷新列表
            articleList()
        })
            .catch(() => {
                ElMessage({
                    type: 'info',
                    message: '取消删除！'
                })
            })
    }

</script>

<style lang="scss" scoped>
    .page-container {
        min-height: 100%;
        box-sizing: border-box;

        .header {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
    }

    .el-select {
        width: 200px;
    }

    /* 抽屉样式 */
    .avatar-uploader {
        :deep() {
            .avatar {
                width: 178px;
                height: 178px;
                display: block;
            }

            .el-upload {
                border: 1px dashed var(--el-border-color);
                border-radius: 6px;
                cursor: pointer;
                position: relative;
                overflow: hidden;
                transition: var(--el-transition-duration-fast);
            }

            .el-upload:hover {
                border-color: var(--el-color-primary);
            }

            .el-icon.avatar-uploader-icon {
                font-size: 28px;
                color: #8c939d;
                width: 178px;
                height: 178px;
                text-align: center;
            }
        }
    }

    .editor {
        width: 100%;

        :deep(.ql-editor) {
            min-height: 200px;
        }
    }
</style>